<template>
    <!-- html -->
     <div class="app">
        <h1>你好</h1>
     </div>
</template>

<script lang="ts">
 export default {
    name:'App'
 }
</script>

<style>
.app{
    background-color: #ddd;
    box-shadow: 0 0 10px;
    border-radius: 10px;
    padding: 20px;
}
</style>
